Hammer saw set and straightening device



May 7, 1929. 4a. CRANE HAMMER SAW SET AND STRAIGHTENING DEVICE FiledSept. 2, 1927 E .N. R

Patented May 7, 1929 UNITED STATES- 1,711,558 PATENT" I E- ANDRE-W clmmr PRIGHARD, inane,

HAMMER SAW SET AND ST'RAI GHTENING DEVICE.

Application filed September 2 1927. Serial 110 211125."

The object of this invention is to provide a device adapted to be usedwith a hammer, for setting and correcting certain defects in the teethof a cross cut saw, the device having portions for correcting certainother defects without the aid of a hammer.

said means providing clearance atdifferent depths whereby any extent oflength of the tooth may be corrected without m ury to the point thereof.

A further feature. consists in means for correcting the alinement of theraker teeth should the latter become bent out of line, and for.alsocorrecting the edge portions of said. teeth.

The invention has many other ob ects and features which will be morefully descrlbed in connection with the accompanying drawing and whichwill be more particularly pointed out in and by the appended claim.

In the drawing:

Fig. 1, is a view in side elevation of one form of my improved toolbody.

Fig. 2, is an edge view thereof looking from the left of Fig. 1.

F ig..3, is an edge view looking from the right of Fig. 1.

Fig. 4, is a fragmentary side view show in how'the device is used to seta tooth.

*ig. 5, is a fragmentary side view showing how the device is used tostraighten a tooth.

Fig. 6, is a View, of a portion of a cross cut saw showing a raker toothand the manner in which the device is used to correct a deformationthereof.

Fig. 7, is a view showing how the device is used to aline the rakerteeth.

Like characters of. reference designate similar parts throughout thedifferent figures of the drawing.

My improved tool body consists of a head which is generally designatedat 1, and a shank or handle which is generally designated at 2. Thehandle 2, extends downwardly from the head 1, at a convenientangle sothat when the user grips the handle he can not only support the head inproper relation to the saw but he can exert stress to keep the head in 1position thereagainst.

First describing the head 1, the sameis j provided with what I will terma top face or edge 3 which junctures at 4, with the outer face 5, ofthe. handle 2. The head 1, has an extension 6, which projects below thejuncture 7, of the handle with said head and the outer or front face 8,of said head constitutes a flat abutment section adapted to be locatedagainst the flat side of a saw tootlnorrather against the shank9, of thetooth. Said section has a receding portion 10, which is abreast of thetaperedpoint'l'l, of the tooth of the saw and which permits of the sawtooth point being hammered and bent to form the set of the tooth, asclearly shown in Fig. 4:. V

Assuming that a saw tooth has become accidentally bent as regards itsshank 9, between its pointiand base, then, such tooth must be hammeredintoa straightened posi:

'tion, for which. special means is provided,

as will now be explained,

Said-head 1, has an angularly disposed tooth straightening section 12,of concave form, which junctures at 13, with section '10, and at 14,with top face 3, and hence'said section 12 may be said to be contiguoustherewith. Thus it will be seen that section 12 is angularly disposedwith respect to sec- 'tion 10 and face 3 so that by grippingthe handle2, the'user can conveniently employ either section 8 or 12, inperforming the function of the tool. In Fig. 5, I .have shown a benttooth with the section 12 disposed in a manner against said tooth sothat said tooth may be hammered into a straight ened position. Theconcave form of section 12 affords the requisite clearance so that thetooth can be straightened without flexing the tooth in a manner reverseto that shown inFig. 5. If section 12, were fiat, its performance wouldbe less satisfactory.

Suppose a tooth of the saw became bent out of the plane of the saw, atthe base of the tooth, or at a point above the base, andthe bend was arelatively sharp bend, then", a

means with which my tool body is provided would then be employed, asIwill next describe.

with a slot 15 extending upwardly from The head 1, and extension 6, isprovided largement would afford such clearance that the point of thetooth would not come into engagement with any portion of the tool whilethe tooth was being bent into the saw plane. If the bend were near thebase of the tooth, then, the tool body would be positioned as shown inFig. 1, sothat the top enlargement 18, would come into play. I do notwish to be limited to two enlargements as any number may be employedwithin the purview of the claim. I

As is well known, the cutting teeth of a cross cut saw are interruptedby what is called a'raker tooth, which I have shown at 19, in Fig. 6.This tooth 19, isnot a set. tooth but always remains in the plane of thesaw and it is-provided with'oppositely extending teeth portions 20.Sometimes these tooth portions 20, get out of alinement with each otherand out of plane with the saw. i

'The device of my invention is provided with means for correcting thisdefect which I will next describe in detail.

In the handle 2, I have provided a slot 21, which is adapted to befitted over the raker tooth 19, as shown in Fig. 7. By

shifting the tool in either direction indicated by the arrows in Fig. 7,the teeth portions 20 can be bent back into alinement.

Sometimes, the overhanging ends 22, of the raker teeth become deformed,and in that case, I shape the edges 23, of the handle 2, in a. manner sothat by disposing the handle in the position shown in Fig. 6, I canreshape and correct such deformation. It will now be seen that in oneintegral tool body, I have provided means for the performance of variousfunctions in conditioning a cross cut saw, and I will next refer to thefeature of the handle 2 which forms a straight edge 24, so that whenthis edge is adjusted against the face of the teeth, it can bedetermined if they are in alinement.

It is believed thatthedevice of my invention will be fully and clearlyunderstood from the foregoing description and while I have herein shownand described one specific form of my invention, I do not wish to belimited .thereto except for such limitations as the claim may import.

I claim: I In a hammer saw set device of the class described a tool bodyadapted to be gripped by the hand of the user and provided with a head,said head having a tooth bending or straightening .slot provided withtooth end protecting enlargements at difierent depths thereof, wherebyteeth of different length may be straightened or-whereby' bentportions'at different heights'ofa tooth may be straightened.

In. witness whereof, I hereby aflix my signature.

' ANDREW CRANE.

